A boy pulled my pants down while I was going across the monkey bars in 1st grade.

I carried that mortification with me until 5th grade when we were playing king of the hill on a huge snow mountain the snow plow had piled up. I was 'queen' and here came this boy who 'pantst' me charging up the hill with his head down. I took a running leap and shoved him off the snow hill... He fell about 4 feet and I broke his clavicle.

He never picked on me again. He asked why I pushed him so hard at a high school party years down the road and I said because you pulled my pants down on the monkey bars in front of the whole school in 1st grade!!!
He didn't even remember! I have learned this about bullies, they have no idea the kind of damage they inflict.

Another kid pushed me off a fence once so I ran him down with my bicycle and gave him stitches.

Too bad you didn't have my parents who were all for defending yourself!